5306-01-129-6931, BOLT,CLOSE TOLERANCE

National Stock Number:
5306-01-129-6931

Federal Supply Class:
5306

National Item Identification Number:
011296931

Description:
BOLT,CLOSE TOLERANCE

Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.

Manufacturer Information:

10115801	A486G	NIMIKKEISTOKESKUS NCB FINLAND
NAS675V105D	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	6.825 INCHES MINIMUM AND 6.865 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	7.016 INCHES MINIMUM AND 7.046 INCHES MAXIMUM
GRIP DIAMETER	0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
GRIP LENGTH	6.552 INCHES MINIMUM AND 6.572 INCHES MAXIMUM
HEAD HEIGHT	0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	TITANIUM ALLOY UNS R54520 OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIFICATION/STANDARD DATA	80205-NAS675 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
WIDTH BETWEEN FLATS	0.492 INCHES MINIMUM AND 0.564 INCHES MAXIMUM
SURFACE FINISH	16.0 MICROINCHES THREADS
SURFACE FINISH	63.0 MICROINCHES GRIP
SURFACE FINISH	63.0 MICROINCHES BEARING SURFACE OF HEAD
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)

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